Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 77 insertions, 0 deletions

diff --git a/third_party/aom/video_writer.c b/third_party/aom/video_writer.c
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+++ b/third_party/aom/video_writer.c
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+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <stdlib.h>
+
+#include "./ivfenc.h"
+#include "./video_writer.h"
+#include "aom/aom_encoder.h"
+
+struct AvxVideoWriterStruct {
+  AvxVideoInfo info;
+  FILE *file;
+  int frame_count;
+};
+
+static void write_header(FILE *file, const AvxVideoInfo *info,
+                         int frame_count) {
+  struct aom_codec_enc_cfg cfg;
+  cfg.g_w = info->frame_width;
+  cfg.g_h = info->frame_height;
+  cfg.g_timebase.num = info->time_base.numerator;
+  cfg.g_timebase.den = info->time_base.denominator;
+
+  ivf_write_file_header(file, &cfg, info->codec_fourcc, frame_count);
+}
+
+AvxVideoWriter *aom_video_writer_open(const char *filename,
+                                      AvxContainer container,
+                                      const AvxVideoInfo *info) {
+  if (container == kContainerIVF) {
+    AvxVideoWriter *writer = NULL;
+    FILE *const file = fopen(filename, "wb");
+    if (!file) return NULL;
+
+    writer = malloc(sizeof(*writer));
+    if (!writer) return NULL;
+
+    writer->frame_count = 0;
+    writer->info = *info;
+    writer->file = file;
+
+    write_header(writer->file, info, 0);
+
+    return writer;
+  }
+
+  return NULL;
+}
+
+void aom_video_writer_close(AvxVideoWriter *writer) {
+  if (writer) {
+    // Rewriting frame header with real frame count
+    rewind(writer->file);
+    write_header(writer->file, &writer->info, writer->frame_count);
+
+    fclose(writer->file);
+    free(writer);
+  }
+}
+
+int aom_video_writer_write_frame(AvxVideoWriter *writer, const uint8_t *buffer,
+                                 size_t size, int64_t pts) {
+  ivf_write_frame_header(writer->file, pts, size);
+  if (fwrite(buffer, 1, size, writer->file) != size) return 0;
+
+  ++writer->frame_count;
+
+  return 1;
+}